(a) Explain with examples the terms competitive demand and complementary demand. 
(b) With the aid of diagrams, analyse the effect of a decrease in the import duty on cars on the price and consumption of petrol. 

(a)What is the demographic transition theory?
(b) Explain the three stages of the theory. 

(a) Differentiate between shares and debentures.
(b) Identify any four problems encountered by firms in raising capital,

(a) Describe the following types of co-operative societies;
(i) consumers' co-operatives;
(ii) producers' co-operatives;
(iii) thrift and credit co-operatives.

(b) Highlight any two problems faced by co-operative societies in West Africa 

(a) What is economic development? (b) Outline any five features of a Development Bank.